.head{
    height: calc(10% - 1px);
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
}
.head_button{
    margin-left: 5%;
    border-radius: 5px;
}
a:link {color: blue; text-decoration:none;border-radius: 10px;padding: 1px}
.section{
    margin-top: 5%;
    height: calc(80% - 1px);
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;

}
.div{
    width: calc(20% - 2px);
    height: 20%;
    background-color: gainsboro;
    margin-left: 10%;
    border-radius: 25px;
    /*padding: 1% 3%;*/
    padding: 10px 10px;
}